Answer:
x = 4.5
Step-by-step explanation:
Since the perimeters are equal , then the equation relating them is
2x + 3 + 2x - 3 + x = x + 3 + x + 3 + x + 3 , that is
5x = 3x + 9 ( subtract 3x from both sides )
2x = 9 ( divide both sides by 2 )
